LINE STRANA — LUMEN CORE
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LINE STRANA — Lume Core Bracelet
Defined by a single line of light.
Part of the Line Collection, LINE STRANA — Lume Core integrates a luminous axis into a solid forged carbon structure.
A single strontium aluminate core is embedded within the composite bar, remaining subtle in daylight and emitting a controlled glow in low light.
No electronics. No battery. Only material, responding to light.
The forged carbon exterior maintains structural clarity, while the integrated luminous core introduces measured contrast through illumination.
Material contrast. Controlled visibility. Engineered restraint.
Details
- Collection: Line Collection
- Material: Solid forged carbon fiber
- Luminous Core: Integrated strontium aluminate (Blue or Green)
- Bar Dimensions: 41 × 9.5 mm
- Finish: Hand-polished gloss
- Cord: Premium braided leather
- Closure: Precision magnetic clasp
- Origin: Manufactured entirely in-house
Features
- Machined from a single carbon block
- Integrated luminous core — not paint or coating
- Charges with sunlight or UV light
- Hours of glow per charge
- Hypoallergenic
- Each forged carbon pattern is one-of-one
Structural minimalism. Revealed in low light.
Ring Size Guide
Ring Size Guide
| US Size | Diameter (mm) | Circumference (mm) |
|---|---|---|
| 6 | 16.5 | 52.0 |
| 7 | 17.3 | 54.5 |
| 8 | 18.2 | 57.0 |
| 9 | 18.9 | 59.5 |
| 10 | 19.8 | 62.1 |
| 11 | 20.6 | 64.6 |
| 12 | 21.4 | 67.2 |
| 13 | 22.2 | 69.7 |
| 14 | 23.0 | 72.3 |
How to Measure at Home
Method 1 — Use an existing ring
- Measure the inner diameter of a ring that fits you
- Match the measurement to the chart above
Method 2 — String or paper method
- Wrap a string or strip of paper around your finger
- Mark where the ends meet
- Measure the length in millimeters
- Match to the circumference column
Tip: Measure at the end of the day when fingers are slightly larger for the most accurate fit.
Bracelet Sizing
SIZING GUIDE
Engineered fit starts with accurate measurement. Follow the steps below to select the correct size.
BRACELET SIZING
How to Measure Your Wrist
- Measure your wrist just above the wrist bone.
- Use a flexible measuring tape. If you don’t have one, use a string and measure it against a ruler.
- Keep it snug — not loose, not tight.
- Do not add extra space. We include a comfort allowance in the bracelet design.
Bracelet Size Chart
| Size | Wrist Circumference (cm) | Wrist Circumference (in) |
|---|---|---|
| XS | 14.5 – 16 cm | 5.7 – 6.3 in |
| S | 16 – 17 cm | 6.3 – 6.7 in |
| M | 17 – 18.5 cm | 6.7 – 7.3 in |
| L | 18.5 – 20 cm | 7.3 – 7.9 in |
| XL | 20 – 21.5 cm | 7.9 – 8.5 in |
Between sizes? Choose the larger size for a looser fit.
Choose options